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Theme: Clue Symmetry and Logic (Bonus for Daniel Cohen and our other patrons)

Author/Opus: This is the 237th puzzle from our contributing puzzlemaster Grant Fikes.

Answer String: For each cell in the marked rows/columns, enter the area of the polyomino it belongs to. Enter just the last digit for any two-digit number. Start with the 8th row, followed by a comma, followed by the 9th column.